diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index ca27b9eeb..008a5ed83 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="2024b-2"
-export PIKA_PACKAGE_NAME="tzdata"
+export PIKA_PACKAGE_VERSION="6.6.2+dfsg-11"
+export PIKA_PACKAGE_NAME="qt6-base"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"